Previously, the use of wet ESPs was restricted to a few specialized applications. As higher
efficiencies have currently become more desirable, wet ESP applications have been increasing. Wet
ESPs are limited to operating at stream temperatures under approximately 170°F. In a wet ESP,
collected particulate is washed from the collection electrodes with water or another suitable liquid.
Some ESP applications require that liquid is sprayed continuously into the gas stream; in other cases,
the liquid may be sprayed intermittently. Since the liquid spray saturates the gas stream in a wet ESP, it
also provides gas cooling and conditioning. The liquid droplets in the gas stream are collected along
with particles and provide another means of rinsing the collection electrodes. Some ESP designs
establish a thin film of liquid which continuously rinses the collection electrodes